CN108398181B - Integrated physiological signal detection sensor - Google Patents
Integrated physiological signal detection sensor Download PDFInfo
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- CN108398181B CN108398181B CN201810119651.0A CN201810119651A CN108398181B CN 108398181 B CN108398181 B CN 108398181B CN 201810119651 A CN201810119651 A CN 201810119651A CN 108398181 B CN108398181 B CN 108398181B
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- circuit board
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- unit circuit
- piezoelectric film
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/18—Shielding or protection of sensors from environmental influences, e.g. protection from mechanical damage
- A61B2562/182—Electrical shielding, e.g. using a Faraday cage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Micromachines (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
本发明公开了一种一体式生理信号检测传感器包括自由外壳、固定外壳和传感单元电路板，所述自由外壳与固定外壳之间连接形成一个内部空间，所述传感单元电路板固定安装于空间内的固定外壳上，所述传感单元电路板上贴附有压电薄膜，环绕所述压电薄膜周边设有镂空区域，所述自由外壳上对应于压电薄膜的位置设有凸点。其优点在于本发明的传感器既能简化传感器安装，提高信号完整性，又能简化电磁屏蔽层连线的安装，从而消除传感器安装误差提高数据检测准确性。
The present invention discloses an integrated physiological signal detection sensor including a free shell, a fixed shell and a sensing unit circuit board, wherein the free shell and the fixed shell are connected to form an internal space, the sensing unit circuit board is fixedly mounted on the fixed shell in the space, a piezoelectric film is attached to the sensing unit circuit board, a hollow area is arranged around the periphery of the piezoelectric film, and a convex point is arranged on the free shell at a position corresponding to the piezoelectric film. The advantage is that the sensor of the present invention can simplify the sensor installation, improve the signal integrity, and simplify the installation of the electromagnetic shielding layer connection line, thereby eliminating the sensor installation error and improving the data detection accuracy.
Description
Technical Field
The invention relates to the technical field of structural design of micro-motion sensors, in particular to an integrated physiological signal detection sensor.
Background
The application principle of the piezoelectric film sensor is as follows: the piezoelectric film has the characteristics of light weight, thinness, softness and high sensitivity, is very sensitive to dynamic stress, is used as a dynamic strain sensor and is commonly used in the field of physiological signal detection, converts a physiological weak vibration signal into a piezoelectric signal, and realizes data acquisition of physiological characteristics. The upper cover and the lower cover of the sensor relatively run, so that a fulcrum of the upper cover presses one end of the suspended beam support, the beam support is bent downwards, and the beam support has certain hardness, so that the deformation of the downward bending is uniform, and the piezoelectric film clung to the beam support is driven to deform uniformly, thereby realizing the acquisition of physiological parameters of the sensor.
The existing piezoelectric film mainly has the following defects
1. The sensor is connected to the signal processing circuit board in a cable connection or direct welding mode, external radiation interference can be received when data are acquired, and an installation error is introduced to cause inaccurate signal detection results.
2. The existing sensor is installed by adopting bare air mostly, and is difficult to avoid spatial electromagnetic interference and power frequency interference without adopting any shielding measures.
3. The existing sensor shell shielding layer needs to be connected to a circuit board shielding ground signal point or a reference signal point through a lead, so that the installation process is complex, or the sensor reference signal point is directly propped against the surface shielding layer in the movement direction of the free shell through an elastic piece such as a thimble or a spring, and the elastic piece easily introduces direct vibration errors, so that the data detection result is inaccurate.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an integrated physiological signal detection sensor which can simplify the installation of the sensor, improve the signal integrity and simplify the installation of an electromagnetic shielding layer connecting line, thereby eliminating the installation error of the sensor and improving the data detection accuracy.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides an integral type physiological signal detects sensor, includes free shell, fixed shell and sensing unit circuit board, be connected between free shell and the fixed shell and form an inner space, sensing unit circuit board fixed mounting is on the fixed shell in the space, the last piezoelectric film that has of sensing unit circuit board encircles the piezoelectric film periphery is equipped with the fretwork area, the position that corresponds the piezoelectric film on the free shell is equipped with the bump.
Further, the sensing unit circuit board is fixedly mounted on the fixed shell through a fixed screw post.
Further, shielding plating layers are respectively arranged on the opposite surfaces of the free shell and the fixed shell.
Further, POGOPIN connectors of the sensor are mounted on the edge of the sensor unit circuit board and contact the shielding layer of the free housing.
Further, a soft gasket is arranged between the sensing unit circuit board and the fixed shell.
Further, at least one piezoelectric film is attached to the sensing unit circuit board, each piezoelectric film is provided with a hollowed-out area in a surrounding mode, and at least one protruding point is arranged on the free shell corresponding to the position where each piezoelectric film is located.
The invention has the advantages that:
1. The free shell and the fixed shell of the sensor are sealed by the soft rubber gasket, the upper shell can be restored to the original position after the stress is eliminated due to the action of the silica gel gasket, and meanwhile, the soft gasket is arranged between the piezoelectric film and the fixed shell, so that the external vibration interference can be relieved, and the sensor of the invention obtains better vibration signals.
2. The piezoelectric film of the sensor is attached to the circuit board of the sensing unit, and the periphery of the piezoelectric film surrounds the hollowed-out area, so that wiring on the circuit board is facilitated, after a vibration signal is converted into a charge output signal through the piezoelectric film, the charge output signal can be connected to a signal processing circuit through the shortest connecting wire for filtering and amplifying processing, the output of the processing result acquired from an electric signal is realized on the same circuit board, the signal integrity is enhanced, and the installation error caused by the external sensor is avoided.
3. The free shell and the fixed shell of the sensor are both provided with shielding layers, and POGO PIN connectors are arranged at the edges of a circuit board of a sensing unit, so that the POGO PIN connectors laterally contact with the conductive coating of the free shell, the free shell is communicated with the reference potential of the circuit board, and meanwhile, the influence on the forward pressure of the free shell when an elastic contact piece is vertically arranged with the free shell is avoided.
Drawings
For a clearer understanding of the objects, features and advantages of the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings, wherein:
FIG. 1 is a schematic diagram of an integrated physiological signal detection sensor according to the present invention;
FIG. 2 is a schematic plan view of a circuit board structure of a sensing unit according to the present invention in a first embodiment;
FIG. 3 is a schematic plan view of a circuit board structure of a sensing unit according to the present invention in a second embodiment; .
Reference numerals and components referred to in the drawings are as follows:
1. A free shell 2, a fixed shell 3, a sensing unit circuit board 4, a soft rubber gasket 5 and a fixed screw,
6. Soft pad, 7, POGOPIN connector, 8 external communication and power supply connector, 11 and salient point,
31. Piezoelectric film, 32, fretwork area.
Detailed Description
The structure of the sensor of the present invention will be described in detail in this specification through two specific embodiments so that the structure of the present invention can be more easily understood and more clearly understood.
As shown in fig. 1, the integral physiological signal detecting sensor of the present invention has a complete structure comprising: a free housing 1, a fixed housing 2 and a sensor unit circuit board 3. Wherein the free shell 1 and the fixed shell 2 are connected by adopting a soft rubber gasket 4 to form an inner space. In practical application, in order to achieve the optimal shielding effect, an elastic conductive material is generally selected to connect the free shell 1 and the fixed shell 2, a soft rubber pad such as a silica gel pad is most preferably selected, the soft rubber pad has elasticity, when the outer surface of the free shell 1 is stressed in the vertical direction, the silica gel pad is extruded to enable the free shell 1 and the fixed shell 2 to generate relative motion with tiny displacement, and when the stress of the free shell 1 disappears, the free shell can restore to the original position due to the action of the silica gel pad, so that the stability of the sensor structure is ensured.
As shown in fig. 1, the sensor unit circuit board 3 is located in an inner space formed by the free casing 1 and the fixed casing 2 and is fixedly mounted on the fixed casing 2, so that the sensor unit circuit board 3 and the fixed casing 2 are fixedly connected to reduce interference of environmental vibration, and in practice, contact points can be arranged on the fixed casing 2 to enable a shielding layer of the fixed casing 2 to be conducted with a reference end circuit on the sensor unit circuit board 3, thereby playing a role in shielding interference. The piezoelectric film 31 is attached to the surface of the sensing unit circuit board 3, and according to the actual application scene, the piezoelectric film 31 can be attached to the surface close to the free shell 1 or the surface close to the fixed shell 2. The free shell 1 is provided with a bump 11 at a position corresponding to the piezoelectric film 31, the bump is tightly attached to the piezoelectric film 31, and vibration signals are transmitted to the piezoelectric film 31 through the bump 11 of the free shell 1.
Embodiment one:
the first embodiment will be described in detail with reference to fig. 2, which is a schematic structural diagram of a circuit board of a sensing unit. In this embodiment, the sensing unit circuit board 3 is fixedly mounted on the fixed housing 2 through the fixing screw post 5, a piezoelectric film 31 is attached to one surface of the sensing unit circuit board 3, which is close to the fixed housing 2, a soft gasket 6 is mounted between the piezoelectric film 31 and the fixed housing 2, and the soft gasket 6 can relieve vibration interference of the fixed housing 2 due to external pressure, so that the piezoelectric film 31 can obtain more accurate vibration signals.
In this embodiment, a rectangular hollow area 32 is disposed around a piezoelectric film 31 on the sensing unit circuit board 3, so that the piezoelectric film area surrounded by the hollow area on the sensing unit circuit board 3 can vibrate freely, thereby forming a cantilever structure. The rectangular hollowed-out area 32 is specifically hollowed-out with three surfaces, and one surface is left for wiring. The vibration signal detected by the sensor unit circuit board 3 is converted into a charge output signal by the piezoelectric film 31, and is connected to a signal processing circuit by a shortest connection line, and subjected to filtering amplification processing. The amplified analog signal is changed into a digital signal by AD change, and is processed by a processor through an algorithm. Through the setting of fretwork area 32, make piezoelectric film 31 through simplifying the wiring under the prerequisite of guaranteeing that signal detection is accurate for the signal of telecommunication that piezoelectric film produced all goes on same circuit board from gathering the output whole process of handling the result, has strengthened signal integrity, has avoided the installation error that leads to because of the external mounting of sensor. In order to further enhance the effect of suppressing the interference of the sensor to external radiation, the surfaces of the free casing 1 and the fixed casing 2, particularly the inner surfaces of the space, are respectively provided with shielding layers (the surfaces of the casings are subjected to electroplating treatment to form the shielding layers or materials such as conductive cloth are directly attached). In operation of the sensor, both the free housing 1 and the fixed housing 2 need to communicate with a reference potential of the sensing unit circuit board 3. Since the sensing unit circuit board 3 is fixedly mounted on the fixed housing, in order to conduct the reference potential on the fixed housing 2 and the sensing unit circuit board 3 to shield the interference of external magnetic fields, contact points can be arranged on the fixed housing 2 to realize the communication of reference points. As can be seen from fig. 2, the POGOPIN connector 7 of the sensor according to the present invention is mounted at the edge of the sensor unit circuit board 3 and is in contact with the shielding layer of the free casing 1, thereby achieving reference potential communication of the free casing 1 with the sensor unit circuit board 3. Meanwhile, the condition that the elastic contact piece is vertically arranged on the free shell 1 is avoided, and the elastic contact piece produces forward pressure to the free shell 1 so as to cause interference to influence signal detection. The shielding layer may be formed by electroplating and metallizing the housing, or may be simply provided by a conductive cloth or other material, so as to enhance the radiation interference resistance of the sensing unit circuit board and protect the relatively sensitive piezoelectric film 31.
Example two
The second embodiment will be described in detail with reference to fig. 3, which is a schematic structural diagram of a circuit board of a sensing unit. In this embodiment, the sensing unit circuit board 3 is fixedly mounted on the fixed housing 2 through the fixing screw post 5, two piezoelectric films 31 are attached to one surface of the sensing unit circuit board 3, which is close to the free housing 1, a soft gasket 6 is mounted between the piezoelectric films 31 and the fixed housing 2, and the soft gasket 6 can relieve vibration interference of the fixed housing 2 due to external pressure, so that the piezoelectric films 31 can obtain more accurate vibration signals.
In this embodiment, two piezoelectric films 31 on the sensing unit circuit board 3 are attached to the edge of the sensing unit circuit board 3, and rectangular hollow areas 32 are respectively disposed around the edges of the sensing unit circuit board 3, so that the piezoelectric film areas surrounded by the hollow areas on the sensing unit circuit board 3 can vibrate freely to form a cantilever structure. The right-angle hollow area 32 surrounds the piezoelectric film 31, leaving one side for wiring. Corresponding free casing 1 is provided with protruding points 11 at positions corresponding to the two piezoelectric films 31 respectively, and each free casing 1 corresponding to the positions of the piezoelectric films 31 can be provided with one or more protruding points. The vibration signal detected by the sensor unit circuit board 3 is converted into a charge output signal by the piezoelectric film 31, and is connected to a signal processing circuit by a shortest connection line, and subjected to filtering amplification processing. The amplified analog signal is changed into a digital signal by AD change, and is processed by a processor through an algorithm. Through the setting of fretwork area 32, make piezoelectric film 31 through simplifying the wiring under the prerequisite of guaranteeing that signal detection is accurate for the signal of telecommunication that piezoelectric film produced all goes on same circuit board from gathering the output whole process of handling the result, has strengthened signal integrity, has avoided the installation error that leads to because of the external mounting of sensor. In order to further enhance the effect of the sensor in suppressing external radiation interference, shielding layers are respectively arranged on the surfaces of the free shell 1 and the fixed shell 2, particularly on the inner surface of the closed space. In operation of the sensor, both the free housing 1 and the fixed housing 2 need to be in electrical communication with a reference potential of the sensing unit circuit board 3. Since the sensing unit circuit board 3 is fixedly mounted on the fixed housing, in order to conduct the reference potential on the fixed housing 2 and the sensing unit circuit board 3 to shield the interference of external magnetic fields, contact points can be arranged on the fixed housing 2 to realize the communication of reference points. As can be seen from fig. 2, the POGOPIN connector 7 of the sensor according to the present invention is mounted at the edge of the sensor unit circuit board 3 and contacts the shielding layer of the free housing, thereby achieving reference potential communication of the free housing 1 with the sensor unit circuit board 3. Meanwhile, the condition that the elastic contact piece is vertically arranged on the free shell 1 is avoided, and the elastic contact piece produces forward pressure to the free shell 1 so as to cause interference to influence signal detection. The shielding layer may be formed by electroplating and metallizing the housing, or may be simply provided by a conductive cloth or other material, so as to enhance the radiation interference resistance of the sensing unit circuit board and protect the relatively sensitive piezoelectric film 31.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and additions may be made to those skilled in the art without departing from the method of the present invention, which modifications and additions are also to be considered as within the scope of the present invention.
Claims (7)
1. The utility model provides an integral type physiological signal detects sensor, its characterized in that, the sensor includes free shell, fixed shell and sensing unit circuit board, be connected between free shell and the fixed shell and form an inner space, sensing unit circuit board fixed mounting is on the fixed shell in the space, it has at least one piezoelectric film to paste on the sensing unit circuit board, sensing unit circuit board encircles piezoelectric film periphery is equipped with the fretwork region, makes the piezoelectric film region that fretwork region encircleed on the sensing unit circuit board can freely vibrate, forms the cantilever structure, the position that corresponds piezoelectric film on the free shell is equipped with the bump.
2. The integrated physiological signal detecting sensor according to claim 1, wherein the sensing unit circuit board is fixedly mounted on the fixed housing by a fixing screw post.
3. The integrated physiological signal detecting sensor according to claim 1, wherein the free housing and the fixed housing are provided with shielding layers on opposite sides thereof, respectively.
4. The integrated physiological signal detecting sensor according to claim 3, wherein a POGOPIN connector of the sensor is mounted on an edge of the sensing unit circuit board and contacts a shielding layer of the free casing.
5. The integrated physiological signal detecting sensor according to claim 1, wherein a soft spacer is installed between the sensing unit circuit board and the fixed housing.
6. The integrated physiological signal detecting sensor according to claim 1, wherein each of the piezoelectric films is provided with a hollowed-out area in a surrounding manner.
7. The integrated physiological signal detecting sensor according to claim 1, wherein at least one bump is provided on the free housing corresponding to the position of each piezoelectric film.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119651.0A CN108398181B (en) | 2018-02-06 | 2018-02-06 | Integrated physiological signal detection sensor |
| US16/967,414 US11243111B2 (en) | 2018-02-06 | 2018-08-01 | Integrated physiological signal detection sensor |
| EP18904518.0A EP3751243B1 (en) | 2018-02-06 | 2018-08-01 | Integrated physiological signal detection sensor |
| AU2018407961A AU2018407961B2 (en) | 2018-02-06 | 2018-08-01 | Integrated physiological signal detection sensor |
| PT189045180T PT3751243T (en) | 2018-02-06 | 2018-08-01 | Integrated physiological signal detection sensor |
| PCT/CN2018/097938 WO2019153666A1 (en) | 2018-02-06 | 2018-08-01 | Integrated physiological signal detection sensor |
| RU2020128387A RU2761371C1 (en) | 2018-02-06 | 2018-08-01 | Integrated sensor for detecting physiological signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119651.0A CN108398181B (en) | 2018-02-06 | 2018-02-06 | Integrated physiological signal detection sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108398181A CN108398181A (en) | 2018-08-14 |
| CN108398181B true CN108398181B (en) | 2024-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810119651.0A Active CN108398181B (en) | 2018-02-06 | 2018-02-06 | Integrated physiological signal detection sensor |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US11243111B2 (en) |
| EP (1) | EP3751243B1 (en) |
| CN (1) | CN108398181B (en) |
| AU (1) | AU2018407961B2 (en) |
| PT (1) | PT3751243T (en) |
| RU (1) | RU2761371C1 (en) |
| WO (1) | WO2019153666A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108760027A (en) * | 2018-08-23 | 2018-11-06 | 德清县德意电脑有限公司 | A kind of modified very low frequencies micro-vibration signal inductor |
| CN111649767B (en) * | 2019-12-26 | 2025-02-11 | 麒盛科技股份有限公司 | A split piezoelectric sensor |
| CN114305395A (en) * | 2020-09-29 | 2022-04-12 | 麒盛科技股份有限公司 | Physiological signal detection sensor with environmental vibration compensation |
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- 2018-08-01 WO PCT/CN2018/097938 patent/WO2019153666A1/en not_active Ceased
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- 2018-08-01 EP EP18904518.0A patent/EP3751243B1/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| US11243111B2 (en) | 2022-02-08 |
| WO2019153666A1 (en) | 2019-08-15 |
| EP3751243A1 (en) | 2020-12-16 |
| CN108398181A (en) | 2018-08-14 |
| RU2761371C1 (en) | 2021-12-07 |
| AU2018407961B2 (en) | 2021-12-16 |
| EP3751243A4 (en) | 2021-10-27 |
| EP3751243B1 (en) | 2025-07-23 |
| PT3751243T (en) | 2025-09-16 |
| US20210215533A1 (en) | 2021-07-15 |
| AU2018407961A1 (en) | 2020-09-17 |
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